Helium Balloon Fill Calculator

Mass of balloon

grams

Current air pressure

millibars

Desired rise rate

meters per second

Mass of payload

grams

Current air temperature

°C

Tank volume

in³

Drag Coefficient

Lifting Gas (e.g., helium) Molar Mass

kg/mol

Gas constant

J* mol^-1* K^-1

Gravitational Acceleration

m*s^-2

Air Molar Mass

kg/mol